The genus Leucochrysa McLachlan comprises a large and diverse assemblage of mainly Neotropical species that present numerous systematic problems. This report 1) provides descriptions, illustrations, and keys for males and females of the seven Leucochrysa species now recognized from the United States; 2) synonymizes six previously held names; 3) designates a neotype for Leucochrysa (Nodita) explorata (Hagen) and a lectotype for Leucochrysa (Nodita) pavida (Hagen); 4) describes and illustrates the trash-carrying larvae of four of the seven species from the United States; and 5) reviews and summarizes published and previously unpublished data on the distribution, seasonal occurrence, and biology of each species. Of the seven Leucochrysa species in the United States, two are in the subgenus Leucochrysa and five are in the subgenus Nodita. All of the species also occur in Mexico, Central America, and/or the West Indies.